Mahanagar Telephone Nigam Limited (MTNL) is responsible to upgrade quality of telecom services, expand telecom network, introduce new services and to raise revenue for telecom development. Information is provided on the financial results, internal auditors, human resource, integrity pact, telecom commercial communications, customer preference portal, etc. Details of the MTNL data centres are also provided for the users. Detailed information on corporate network structure is given.